Correct and Improve a circuit of a RGB Lamp

I want to design a simple RGB lamp controlled with an arduino. I need a circuit design based on my idea. These are the main components: - 3.7v rechargeable battery (3000 ma) - 8 or 12 RGB LEDS - An arduino controller that use the Nordic 32 bit ARM Cortex-M0 The lamp will have 4 sides and for each side there are 2 or 3 RGB LEDS. I dont need to set the color of each LED. But i need to set the color of each side (remember: 2/3 RGB per side). That's all. I have projected an ipotetic circuit. One for Common Anode RGB Leds and one for the Common Cathode RGB Leds. [login to view URL] [login to view URL] The work consist in: - Correct my circuit (if needed) - Improve it (Very important! i want any possible suggestion that you have) - Make a list of possibly components to utilize (like what transistors i will utilize, etc etc) - Calculate the resistences values or give me the exact formula to do with different RGB leds. - Calculate the working hours with full battery. Is a quite easy job. I will pay ever an entire hour to do the job. But a skilled Freelancer can do it in 20 minutes.